.container1{
    display:grid;
    grid-template-rows: 1fr 1fr 1fr;
    height:300px;
    border: 1px solid black;
}

.item{
    border: 1px solid red;
}

.container2{
    display:grid;
    grid-template-rows: 1fr 1fr 2fr;
    height:300px;
    border: 1px solid black;
}

.container3{
    display:grid;
    grid-template-rows: 100px 1fr 2fr;
    height:300px;
    border: 1px solid black;
}


.container4{
    display:grid;
    grid-template-rows: repeat(3,1fr);
    height:300px;
    border: 1px solid black;
}
.container5{
    display:grid;
    grid-template-columns: repeat(4,1fr);
    grid-template-rows: 30px 1fr 1fr;
    height:300px;
    border: 1px solid black;
}
